diff --git a/addons/project/project.py b/addons/project/project.py
index 6c9f66dd009..49e2579e92d 100644
--- a/addons/project/project.py
+++ b/addons/project/project.py
@@ -703,7 +703,7 @@ class project_work(osv.osv):
 
     _defaults = {
         'user_id': lambda obj, cr, uid, context: uid,
-        'date': time.strftime('%Y-%m-%d %H:%M:%S')
+        'date': lambda *a: time.strftime('%Y-%m-%d %H:%M:%S')
     }
 
     _order = "date desc"
diff --git a/addons/project_planning/project_planning.py b/addons/project_planning/project_planning.py
index 759057fbaef..72b94c69dec 100644
--- a/addons/project_planning/project_planning.py
+++ b/addons/project_planning/project_planning.py
@@ -138,8 +138,8 @@ class report_account_analytic_planning(osv.osv):
         'total_free': fields.function(_get_total_free, method=True, string='Total Free'),
     }
     _defaults = {
-        'date_from': time.strftime('%Y-%m-01'),
-        'date_to': (datetime.now()+relativedelta(months=1, day=1, days=-1)).strftime('%Y-%m-%d'),
+        'date_from': lambda *a: time.strftime('%Y-%m-01'),
+        'date_to': lambda *a: (datetime.now()+relativedelta(months=1, day=1, days=-1)).strftime('%Y-%m-%d'),
         'user_id': lambda self, cr, uid, c: uid,
         'state': 'draft',
         'business_days': 20,
diff --git a/addons/project_scrum/project_scrum.py b/addons/project_scrum/project_scrum.py
index 82395c3eb35..75f9cfd4a63 100644
--- a/addons/project_scrum/project_scrum.py
+++ b/addons/project_scrum/project_scrum.py
@@ -123,7 +123,7 @@ class project_scrum_sprint(osv.osv):
     }
     _defaults = {
         'state': 'draft',
-        'date_start' : time.strftime('%Y-%m-%d'),
+        'date_start' : lambda *a: time.strftime('%Y-%m-%d'),
     }
 
     def copy(self, cr, uid, id, default=None, context=None):